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Bronwyn Barry, CPHD One Sky Homes Passive House California North American Passive House Network GREENBUILD 2016
33

California (Home) Dreamin': The Passive House Path to NZE

Apr 16, 2017

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Page 1: California (Home) Dreamin': The Passive House Path to NZE

Bronwyn Barry, CPHD One Sky Homes

Passive House California North American Passive House Network

GREENBUILD 2016

Page 2: California (Home) Dreamin': The Passive House Path to NZE

q  Where are we starting from?

q  How low must we go? q  How’s this being done?

q  Lessons Learned

Page 3: California (Home) Dreamin': The Passive House Path to NZE

q  CA homes use 31% less than the U.S. average

q  Expenditure for energy about

the same as U.S. average

q  62M BTU energy use per home = 18,170 kWh

q  Average size = 1,525 SF

q  60% Single Family Homes

Source: www.eia.gov/consumpion/residential

Page 4: California (Home) Dreamin': The Passive House Path to NZE

Energy use: 18,170 kWh/yr Ø  Assume: 400 kWh/panel Ø  12 kW PV Array Ø  = 45 panels!

Source: www.eia.gov/consumpion/residential

Min. Required Roof Area = 780 SF (Assuming 17.3 SF/panel)

Page 5: California (Home) Dreamin': The Passive House Path to NZE

Cars: 12%

Residential: 5.37%

Page 6: California (Home) Dreamin': The Passive House Path to NZE

COTTLE RESIDENCE

Page 7: California (Home) Dreamin': The Passive House Path to NZE

q  3,200 SF home (family of 5) q  28 PV Panels (6.2 kW) q  11,100 kWh production

Page 8: California (Home) Dreamin': The Passive House Path to NZE
Page 9: California (Home) Dreamin': The Passive House Path to NZE
Page 10: California (Home) Dreamin': The Passive House Path to NZE

PROJECT STATS

Co#le-CAClimateZone3

HDD/CDD 2335 574Area/TFA 3200SF 2776SFNetAnnualEnergyUse&ProducCon 9356kWh 11,100kWhPV 6.2kW

Gas/ElectricSplit

GasCooking,SolarHotWaterwithbackup

HVACsystems

HeatPump,NightBreezeCooling,SolarThermalHotWater,HRV

Page 11: California (Home) Dreamin': The Passive House Path to NZE

ASSEMBLIES (hr.ft2.F/BTU)

ROOF/CLG: R-38

T-24 REQ’D VS. AS-BUILT

R-50

WALLS: R-25 R-26

WINDOWS: U-0.38

FLOOR/SLAB: R-0 R-14

U-0.3

Page 12: California (Home) Dreamin': The Passive House Path to NZE

COPYRIGHT ONE SKY HOMES 2016 AFTER

BEFORE

Page 13: California (Home) Dreamin': The Passive House Path to NZE

SUNNYVALE

Page 14: California (Home) Dreamin': The Passive House Path to NZE

COPYRIGHT ONE SKY HOMES 2013

Page 15: California (Home) Dreamin': The Passive House Path to NZE
Page 16: California (Home) Dreamin': The Passive House Path to NZE
Page 17: California (Home) Dreamin': The Passive House Path to NZE

BEFORE

REVISIONS

1'-1

1"

23'-3 1/2"

9'-9

"

25'-1"

11'-8 1

/2"

6'-7" 33'-1"

10

'-4

"

13

'-4

"

46'-8"

4'-0"

22'-2 1/2"39'-2"

1019 V

alle

y F

org

e D

rive

Sunnyv

ale

, C

A 9

4087

04.06.2012

CO

NT

AC

T:

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n G

illila

nd

408-4

21-6

808

PR

OJE

CT

: N

ew

Hom

e @

Date

Scale

Drawn

Job

Sheet

Sheet D

esc

riptio

nD

esi

gn a

nd C

onstr

uctio

n b

y:

182

0 C

ottle

Ave

nue

, S

an J

ose

, C

A95125

Hig

h-P

erf

orm

ance

, Z

ero

-Energ

y H

om

es

PR

OP

OS

ED

ELE

VA

TIO

NS

A4

CS

LB

# 8

226

52

alle

n@

onesk

yhom

es.

com

SE

ZE

N S

TR

UC

TU

RA

L E

NG

INE

ER

ING

B. BARRY

1/4" = 1'-0"

408-4

21-6

808

Str

uct

ura

l Engin

eering b

y:

ON

E S

KY

HO

ME

S274 E

. H

am

ilton A

ve., S

te C

, C

am

pbell,

CA

95008

Vo

ice: 408-8

71-7

273 F

ax:

408-8

71-7

274

CO

NT

AC

T: B

rian M

oon, S

r. E

ngin

eer

Seze

nS

truct

ura

[email protected]

om

PROPOSED ELEVATIONS

Prelim WindowQuote 6.22.12

1/4" = 1'

FRONT - SOUTH EAST

SIDE - SOUTH WEST

SIDE - SOUTH EAST

REAR - SOUTH WEST

REVISIONS

1'-1

1"

23'-3 1/2"

9'-9

"

25'-1"

11'-8 1

/2"

6'-7" 33'-1"

10

'-4

"

13

'-4

"

46'-8"

4'-0"

22'-2 1/2"39'-2"

1019 V

alle

y F

org

e D

rive

Sunnyv

ale

, C

A 9

4087

04.06.2012

CO

NT

AC

T:

Alle

n G

illila

nd

408-4

21-6

808

PR

OJE

CT

: N

ew

Hom

e @

Date

Scale

Drawn

Job

Sheet

Sheet D

esc

riptio

nD

esi

gn a

nd C

onstr

uctio

n b

y:

182

0 C

ottle

Ave

nue

, S

an J

ose

, C

A95125

Hig

h-P

erf

orm

ance

, Z

ero

-Energ

y H

om

es

PR

OP

OS

ED

ELE

VA

TIO

NS

A4

CS

LB

# 8

226

52

alle

n@

onesk

yhom

es.

com

SE

ZE

N S

TR

UC

TU

RA

L E

NG

INE

ER

ING

B. BARRY

1/4" = 1'-0"

408-4

21-6

808

Str

uct

ura

l Engin

eering b

y:

ON

E S

KY

HO

ME

S274 E

. H

am

ilton A

ve., S

te C

, C

am

pbell,

CA

95008

Vo

ice: 408-8

71-7

273 F

ax:

408-8

71-7

274

CO

NT

AC

T: B

rian M

oon, S

r. E

ngin

eer

Seze

nS

truct

ura

[email protected]

om

PROPOSED ELEVATIONS

Prelim WindowQuote 6.22.12

1/4" = 1'

FRONT - SOUTH EAST

SIDE - SOUTH WEST

SIDE - SOUTH EAST

REAR - SOUTH WEST

REVISIONS

1'-1

1"

23'-3 1/2"

9'-9

"

25'-1"

11'-8 1

/2"

6'-7" 33'-1"

10

'-4

"

13

'-4

"

46'-8"

4'-0"

22'-2 1/2"39'-2"

1019 V

alle

y F

org

e D

rive

Sunnyv

ale

, C

A 9

4087

04.06.2012

CO

NT

AC

T:

Alle

n G

illila

nd

408-4

21-6

808

PR

OJE

CT

: N

ew

Hom

e @

Date

Scale

Drawn

Job

Sheet

Sheet D

esc

riptio

nD

esi

gn a

nd C

onstr

uctio

n b

y:

182

0 C

ottle

Ave

nue

, S

an J

ose

, C

A95125

Hig

h-P

erf

orm

ance

, Z

ero

-Energ

y H

om

es

PR

OP

OS

ED

ELE

VA

TIO

NS

A4

CS

LB

# 8

226

52

alle

n@

onesk

yhom

es.

com

SE

ZE

N S

TR

UC

TU

RA

L E

NG

INE

ER

ING

B. BARRY

1/4" = 1'-0"

408-4

21-6

808

Str

uct

ura

l Engin

eering b

y:

ON

E S

KY

HO

ME

S274 E

. H

am

ilton A

ve., S

te C

, C

am

pbell,

CA

95008

Vo

ice: 408-8

71-7

273 F

ax:

408-8

71-7

274

CO

NT

AC

T: B

rian M

oon, S

r. E

ngin

eer

Seze

nS

truct

ura

[email protected]

om

PROPOSED ELEVATIONS

Prelim WindowQuote 6.22.12

1/4" = 1'

FRONT - SOUTH EAST

SIDE - SOUTH WEST

SIDE - SOUTH EAST

REAR - SOUTH WEST

REVISIONS

1'-1

1"

23'-3 1/2"

9'-9

"

25'-1"

11'-8 1

/2"

6'-7" 33'-1"

10

'-4

"

13

'-4

"

46'-8"

4'-0"

22'-2 1/2"39'-2"

1019 V

alle

y F

org

e D

rive

Sunnyv

ale

, C

A 9

4087

04.06.2012

CO

NT

AC

T:

Alle

n G

illila

nd

408-4

21-6

808

PR

OJE

CT

: N

ew

Hom

e @

Date

Scale

Drawn

Job

Sheet

Sheet D

esc

riptio

nD

esi

gn a

nd C

onstr

uctio

n b

y:

182

0 C

ottle

Ave

nue

, S

an J

ose

, C

A95125

Hig

h-P

erf

orm

ance

, Z

ero

-Energ

y H

om

es

PR

OP

OS

ED

ELE

VA

TIO

NS

A4

CS

LB

# 8

226

52

alle

n@

onesk

yhom

es.

com

SE

ZE

N S

TR

UC

TU

RA

L E

NG

INE

ER

ING

B. BARRY

1/4" = 1'-0"

408-4

21-6

808

Str

uct

ura

l Engin

eering b

y:

ON

E S

KY

HO

ME

S274 E

. H

am

ilton A

ve., S

te C

, C

am

pbell,

CA

95008

Vo

ice: 408-8

71-7

273 F

ax:

408-8

71-7

274

CO

NT

AC

T: B

rian M

oon, S

r. E

ngin

eer

Seze

nS

truct

ura

[email protected]

om

PROPOSED ELEVATIONS

Prelim WindowQuote 6.22.12

1/4" = 1'

FRONT - SOUTH EAST

SIDE - SOUTH WEST

SIDE - SOUTH EAST

REAR - SOUTH WEST

AFTER COPYRIGHT ONE SKY HOMES 2013

Page 18: California (Home) Dreamin': The Passive House Path to NZE

PROJECT STATS

Sunnyvale-CAClimateZone3

HDD/CDD 2643 220Area/TFA 2000SF 1560SFNetAnnualEnergyUse&ProducCon 5,765kWh/yr none

Gas/ElectricSplitGasCooking,

DHW

HVACsystems

1tonFujitsuHP&

PanasonicBathFans,

HRV

Page 19: California (Home) Dreamin': The Passive House Path to NZE

ASSEMBLIES (hr.ft2.F/BTU)

ROOF/CLG: R-38

T-24 REQ’D VS. AS-BUILT

R-40

WALLS: R-25 R-26

WINDOWS: U-0.38

FLOOR/SLAB: R-0 R-24

U-0.3

Page 20: California (Home) Dreamin': The Passive House Path to NZE

Table 9: Annual Site and Source Energy Savings Normalize to TMY3 Source: http://www.nrel.gov/docs/fy15osti/63085.pdf

MEASURED SAVINGS: §  $499 per year energy cost §  40% Source Energy

Page 21: California (Home) Dreamin': The Passive House Path to NZE

ALAMO

Page 22: California (Home) Dreamin': The Passive House Path to NZE
Page 23: California (Home) Dreamin': The Passive House Path to NZE
Page 24: California (Home) Dreamin': The Passive House Path to NZE
Page 25: California (Home) Dreamin': The Passive House Path to NZE

PROJECT STATS

Alamo-CAClimateZone12

HDD/CDD 2602 1578Area/TFA 3000SF 2342SFNetAnnualEnergyUse&ProducCon 8,400 kWh13,785 kWhPV 7.5kW Gas/ElectricSplit AllElectric

HVACsystemsHeatPump,

HRV

Page 26: California (Home) Dreamin': The Passive House Path to NZE

ASSEMBLIES (hr.ft2.F/BTU) ASSEMBLIES (hr.ft2.F/BTU)

ROOF/CLG: R-38

T-24 REQ’D VS. AS-BUILT

R-46

WALLS: R-19 R-28

WINDOWS: U-0.57

FLOOR/SLAB: R-0 R-14

U-0.3

Page 27: California (Home) Dreamin': The Passive House Path to NZE

3200 3000 1560 15250

2000400060008000100001200014000160001800020000

Co,le Alamo Sunnyvale Av.CA

EnergyUse&FloorArea

EnergyUse

FloorArea

2.92 2.803.70

11.91

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

Co.le Alamo Sunnyvale Av.CA

EUI(kWh/sf.yr)

Page 28: California (Home) Dreamin': The Passive House Path to NZE

www.passivehousecal.org

Page 29: California (Home) Dreamin': The Passive House Path to NZE

0 1000 2000 3000 4000 5000

BERNSTEIN

MIGHTYHOUSE

CLARUMOFFICE

POESTREET

FIELD/CHIARELLO

STANFORDST

OXFORDST

TreatedFloorArea(>2)

Large

Average Size

Tiny

MIXED USE BLDG

SINGLE FAMILY HOME

COMMERCIAL OFFICE BLDG

SINGLE FAMILY HOME

SFH

SFH

Page 30: California (Home) Dreamin': The Passive House Path to NZE

0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00

BERNSTEIN

MIGHTYHOUSE

CLARUMOFFICE

POESTREET

FIELD/CHIARELLO

STANFORDST

OXFORDST

Floor/Slab(hr.A2.F/BTU)

0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00

BERNSTEIN

MIGHTYHOUSE

CLARUMOFFICE

POESTREET

FIELD/CHIARELLO

STANFORDST

OXFORDST

OverallWindow(hr.A2.F/BTU)

0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00

BERNSTEIN

MIGHTYHOUSE

CLARUMOFFICE

POESTREET

FIELD/CHIARELLO

STANFORDST

OXFORDST

ExteriorWalls(hr.A2.F/BTU)

0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00

BERNSTEIN

MIGHTYHOUSE

CLARUMOFFICE

POESTREET

FIELD/CHIARELLO

STANFORDST

OXFORDST

Roof(hr.A2.F/BTU)

Page 31: California (Home) Dreamin': The Passive House Path to NZE

Ø  Assemblies were all very similar, despite large floor area variation

Ø  All used simple forms and roof design Ø  None have an attached garage

Passive House Design-related observations:

Page 32: California (Home) Dreamin': The Passive House Path to NZE

Passive House & ASHRAE Std 55 – Thermal Comfort

NONE of our clients have asked us to lower their energy bills. ALL have asked for better comfort or to eliminate mold.

COPYRIGHT ONE SKY HOMES 2013

Page 33: California (Home) Dreamin': The Passive House Path to NZE

q  Windows (+ Shading) Matter q  Air sealing gets you half way there q  Roof Design and Form factor are HUGE q  Drive your own energy model!

THANK YOU!

Bronwyn Barry, CPHD One Sky Homes

www.passivehousecal.org www.naphnetwork.org